On-Board Diagnostic (OBD) test mode: Notes

• The OBD system detects malfunction in the exhaust gas purification system and evaporative gas leakage of the vehicle itself, and it records that malfunction content.
• Diagnosis related to the OBD system can be facilitated using the OBD test mode.

Mode 1: On-Board system readiness test

• In Mode 1, the completion status of the PID/data monitor related to the exhaust gas purification system and related system monitors can be verified.
• The system monitor verifies whether the operation condition such as for misfire, fuel, CCM, catalyst, evaporative gas, HO2S, and HO2S heater is operating normally.

Mode 2: Freeze frame data

• Mode 2 reads out the freeze frame data.
• The M-MDS displays the freeze frame data automatically when the CMDTCs are displayed.

Mode 3: Exhaust gas purification system related CMDTC

• Mode 3 reads out the CMDTCs related to the exhaust gas purification system.
• When a quick check is performed, the M-MDS automatically reads out the CMDTCs related to the exhaust gas purification system.

Mode 4: Exhaust gas purification system-related malfunction information deletion/reset

• Mode 4 deletes/resets information (such as CMDTC, pending code, and freeze frame data) related to the exhaust gas purification system.
• When the DTCs are cleared, the M-MDS automatically deletes/resets the information related to the exhaust gas purification system.

Mode 5: HO2S monitor test

• Mode 5 reads out the results of HO2S monitor test.
• The M-MDS does not support because it substitutes for Mode 6.

Mode 6: Diagnostic monitoring test

• Mode 6 reads out the results (number of misfires of each cylinder) of each system monitor test.

Mode 7: Pending code

• Mode 7 reads out the pending codes.
• When a self-test is performed, the M-MDS automatically reads out the pending codes.

Mode 8: Force drive

• Mode 8 performs force drive.
• The M-MDS is used only for forcibly driving the valve for the outlet opening to atmosphere of the charcoal canister to check for fuel evaporative gas leakage.

Mode 9: Vehicle information read out

• Mode 9 reads out information such as the vehicle identification number and calibration ID number.